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FR2497377B1 - DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM - Google Patents

DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM

Info

Publication number
FR2497377B1
FR2497377B1 FR8027689A FR8027689A FR2497377B1 FR 2497377 B1 FR2497377 B1 FR 2497377B1 FR 8027689 A FR8027689 A FR 8027689A FR 8027689 A FR8027689 A FR 8027689A FR 2497377 B1 FR2497377 B1 FR 2497377B1
Authority
FR
France
Prior art keywords
information medium
exploring
optically
optically exploring
medium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR8027689A
Other languages
French (fr)
Other versions
FR2497377A1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR8027689A priority Critical patent/FR2497377B1/en
Priority to EP81401935A priority patent/EP0055645A3/en
Priority to CA000392775A priority patent/CA1183604A/en
Priority to JP56215920A priority patent/JPS57133530A/en
Publication of FR2497377A1 publication Critical patent/FR2497377A1/en
Application granted granted Critical
Publication of FR2497377B1 publication Critical patent/FR2497377B1/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/123—Integrated head arrangements, e.g. with source and detectors mounted on the same substrate

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
FR8027689A 1980-12-29 1980-12-29 DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM Expired FR2497377B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR8027689A FR2497377B1 (en) 1980-12-29 1980-12-29 DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM
EP81401935A EP0055645A3 (en) 1980-12-29 1981-12-04 Optical pick-up device of a record carrier
CA000392775A CA1183604A (en) 1980-12-29 1981-12-21 Device for the optical scanning of a data medium
JP56215920A JPS57133530A (en) 1980-12-29 1981-12-26 Optical scanner for data medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8027689A FR2497377B1 (en) 1980-12-29 1980-12-29 DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM

Publications (2)

Publication Number Publication Date
FR2497377A1 FR2497377A1 (en) 1982-07-02
FR2497377B1 true FR2497377B1 (en) 1985-06-28

Family

ID=9249570

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8027689A Expired FR2497377B1 (en) 1980-12-29 1980-12-29 DEVICE FOR OPTICALLY EXPLORING AN INFORMATION MEDIUM

Country Status (4)

Country Link
EP (1) EP0055645A3 (en)
JP (1) JPS57133530A (en)
CA (1) CA1183604A (en)
FR (1) FR2497377B1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7402768A (en) * 1974-02-28 1975-09-01 Philips Nv DEVICE FOR WRITING AND / OR DISPLAYING INFORMATION IN RESPECTIVE OF A ROTATING DISK REGISTRATION CARRIER.
NL164689C (en) * 1975-03-10 1981-01-15 Philips Nv OPTICAL FOCUSING DEVICE FOR FOCUSING A RADIUS BUNDLE.
JPS5953612B2 (en) * 1975-11-19 1984-12-26 カブシキガイシヤ フジテレビジヨン Kodenshikisai Seihouhou
NL176315C (en) * 1976-05-12 1985-03-18 Philips Nv OPTICAL SCANNER.
NL7703232A (en) * 1977-03-25 1978-09-27 Philips Nv OPTICAL SCANNER.
FR2443734A1 (en) * 1978-12-08 1980-07-04 Thomson Csf DEVICE FOR ACCESSING A TRACK CARRIED BY AN OPTICALLY READABLE OR RECORDABLE MEDIUM AND OPTICAL SYSTEM COMPRISING SUCH A DEVICE
FR2474221A1 (en) * 1980-01-23 1981-07-24 Thomson Csf OPTICAL DEVICE FOR RECORDING AND READING INFORMATION MEDIA AND OPTICAL MEMORY SYSTEM COMPRISING SUCH A SYSTEM

Also Published As

Publication number Publication date
EP0055645A3 (en) 1982-08-11
CA1183604A (en) 1985-03-05
JPS57133530A (en) 1982-08-18
FR2497377A1 (en) 1982-07-02
EP0055645A2 (en) 1982-07-07

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Legal Events

Date Code Title Description
ST Notification of lapse